Brush-holder.



H. L. ZABRISKIE.

BRUSH. HOLDER. APPLICATION FILED sEPT. 9,1904.

Patented Feb. 16, 1909.

INVENTOH ATTORNEY W/TNESSES unrrnn m i ii "in is llQiii.

K, ASSlGNOlt TO DIEHL MANUFACTYRING COMPANY, A CORPORATION OF NEWJERSEY.

BRUSH-HOLDER.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed September 9, 1904. Serial No. 223,811.

To all whom it may concern: 7

4 Be it known that I, HENRY L. ZABRISKIE, a citizen of the UnitedStates, residing at Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements inBrusl1llolders, of which the following is a specification, reterencebeing had therein to the accompanying drawings.

The object of this invention is to provide a hrushdioider ol' the boxtype which sl'ieil be compact, rigid and simple in construction,

- pair of laterally projecting; spec.

and which shall be readily inlerchungeohle in machines oi' the some ordilierent sizes, and in which the tension of the brush upon thecommutator shall be uniform throughout a large range of movement ol thebrush by reason of its wear upon the surlnco ol' the commutator.

In the preferred form of the present invention, the usuul supportingstud or nmndrol oi' the machine has secured thereon, so as to headjustable circularly-end lonogitudiurlly, cd rigid arms of the brushsocket, and has fitted thereon a loose sleeve having attached theretoone end of a coiled spring encircling the some and provided with alateral arm extended into elineinen t with the hruslusockot to bear uponthe outer end'ol the carbon brush-block, the sleeve having formed olsoupon one end seginentsl series of ratchet-leoth mlupiod to be engaged bye. springpressod p iwl pivotally connected with the brush socket, thesaid sleeve being provided with u radial arm by which it may he turnedin opposition to said spring 'ior presentation ol' dill'erontratohetdeeth oi the series to the pawl in adiusting' the tension of thesprin In the drowin annexed. uro l is a. front view oi the hrushdn'fdorcmhodyi the present ilnprimoment, und l ig i2 1. side View ol' the someshowing: u portion of the commutator of n dynamo electric muchino. Fig.3 is it transverse section ol the brushholder, and l lo. 4 :1- plnn ol'the same.

1 The l'rume ol the hrush-lulhlor comprises two SPitCCfl supporting arms2 having: holes in their outer ends iiltod to the ln'uslhhoider stud 1,one of such arms living-g lixod upon such stud by means ol the sot-screw3). 'lho connecting plate at :it the opposite end ol the arms .Zi'ormsa. well of the guiding hox or socket open at the ends and having); theother three sides formed by the angular cop piece 5 secured thereto bythe screws or rivets 6. intermediate the arms 2 is mounted upon the studl the loose sleeve 7 to which is attoched by means of a sorew 8 theinner end of a coiled spring 9 whose outer portion is termed in astraight tangential arm 10 having a reversoly bent extremity extendinginto the line of the brush socket 4, 5. The sleeve 7 is provided with aseries of peripheral ratchet teeth 11 ei'igag ed by the operative end ofan annular pawl-lever 12 pivotally mounted at 13 upon the inner side ofone of the arms 2 and i'nointained yieldingly in en 'egcment with therate rot teeth 11 by means of a spring 14 secured upon the arm 2 by afastening screw 15. A radial pin 16 is provided upon the sleeve 7 toserve as a hendlc in turning the some, while the arm 17 of the angularpawl-lover serves a. similar purpose whcn it is (lQSllGtl to shift thepawl to disengage it from the ratchet teeth upon the sleeve 7. v

The brush, shown herein consisting of a carbon block 18, is providedwith a rounded end against which the outer end ol'the tangential arm 10oi the spring 9 rests, current being carried from the brush to the stud19 upon the hrusmholder frame by means of a 'tloxiho Conncoting: lend.ln the use ot the device, the holder having been applied to thesupporting; stud 1 with the compmiont ports in the relations abovedescribed, and the outer end of the springarm 10 being brought to beerupon the rounded rear end of the brush 18, the tension ol the s n-lug ism'ljusted' by turning the sleeve by means of the radial rod 16, thereturn rot-zit "in of the same heing: prevented by the pnwL-levor 111'As the brush wears down by its ruhhino; contact with the coiniuutotor31, the arm 10 ndvencesnnd, by reason or" the tangential relation of thebrushg'uiding lot or solhot with the axis of the springlovor, the lettercontinues to exert its prossuie in e direction substantiallylongitudinul of the hrush by reason of its unwinding, due to the{gradual yielding of the abutment ollored h the end ol the brush and thecol'isequeut changed angular position of its free arm 10. As this springis referebly formed of it very thin strip of meta in several coils, endits operation is substantially in the direction of motion of the brushunder the wearing; action of the commutator thereon, the spri operateswith greet uniformity theii ems of its coils is coincident with thetoithe supportmgstud, it is evident that a greet in compactness is securedas compared with other forms of brush-holders of this class heretoforedevised, while the particular relation of the irsnm with the oose sleevemakes it s simple'matter design brush-holders of this ch.e-rec ter forvarying sizes of brushes with practically no remodeling ofthe' ports.excepting changes the Widths ot'the members surficient to accommodatethe brushes of-different sizes,

The present improvement e fiords certain l edventeges over brush-holdersof its class heretofore devised, among which may-he mentioned itscomactness end cepebility of adjustment wit in Wide limits. the employmentof the retchetend-pewl holding device for the sleeve 7, e locking memberis provided, in the'pewl i2, heving sidewi e movements longitudinally ofthe brush-wider stud 1, end the width of the frame 2, l, 5, is reducedto e minimum, whereby a number may be placed side-by side upon the studfor use with the larger conimutetors requiring a large contact surface othe brushes, which is necessarily sectioned in character in order toinsure the best contect relation. 'lfiecli brush-holder,

according to the present invention, is entirely disposing the spring insuch manner stud or mandrel, of e brushdiolder' comprissfremeconstructed with e brush-socxet open at the opposite ends and providedwith a pair of leterally projecting spaced rigid srms having elinedtransverse apertures fitted to and entered by said stud orr'nsndrel,means carried by said. frame for securing itupon said stud or mandrelsdjustebly circularly end longitudinally, s tubular sleeve looselyfitted directly upon and supported by said stud or mandrelintermediate-sold arm's, coiled spring encircling end'heving one endattached to said sleeve and provided at the other end with e lateral ermextended into line with and adjacent one end of the socket, era'tchet-end-pswl device intermediate one of said spaced arms and theloose sleeve for locking the letter from turning under the action of thespring, and means applied to the sleeve independently of its lockingmeans for turning it to Wind up the spring.

2. ihe combination with a supporting stud or mandrehof a brush-holdercomprising a, frame constructed with a brush-sooket open at the oppositeends and provided with a,'paiiof laterally projecting spaced rigidv armshaving ulined transverse apertures :itted to and entered by said stud ormandrel, means carried by said frame for securing it upon said stud ormandrel adjustebl circulerly and longitudinally, a tubular sleevelooselyiitted directly upon and supported by said stud or mandrelintermediate said arms and provided at one end with a segmental s e riesof ratchet-teeth, e coiled s ring encir- 100 cling end having one endattac led to said sleeve, and provided at the other end with a lateralarm extended into line with end adjacent one end of the socket, a sprin-pressedpawl pivotelly mountedupon one of said spaced arms and adaptedto engage said ratchet-teeth for locking the letter from turning underthe action of the sprin'", and means ud 1, such'construction affording erange applied to the sleeve independently of its adjustment which is noteffected by the lOfiFlDg means for turning it to Wind up the spring. v

3. The combination with a supporting stud or mandrel, of u brush-holdercomprisseli-conteined, the supporting arms 2 carry-.1 ing means (as theset screws 3), for securing therein any position of longitudinalorcircular adjustment upon the brush-holder plicstou of e series of suchbrush-holders common brush-holder stud, end each capable of ad ustmentindependentl character.

While i have shown and described herein only a single embodiment of theresent improvement, it Will be understood t rat the letter issusceptible of considerable modification in construction withoutdeparture from the spirit of the invention.

Having thus set forth the nature of my invention, whet I claim hereinis,

1. The combination with a supporting ing e frame constructed With abrush socket open at the opposite ends and provided With frame tubularsleeve loosel fitted directl upon and supported by said stud or mandrel'litcrmcdiute arms, a coiled spring encircling un, having one endattached to said sleeve-sud provided at the other end with u luterer armextended into line with the socket ing it upon said stud or mandreladjustebly 120 eras s and adapted to bear upon an end of thebrush-block, a ratchet-and-pawl device in-. termediate one of saidspaced arms and 'the loose sleeve for locking the latter from turn ingunder the action of the spring, and means applied to the sleeveindependently of its locking means for turning it to Wind up the spring.

l. The combination with a supporting stud of dynamo electric machine, ofa brush holder comprising a frame provided with a brush-guiding box orsocket and with a pair of spaced parallel arms each fitted to said stud,with one of the latter secured thereon so as to be adjustable circularlyand longitudinally, a loose sleeve mounted directly upon said studintermediate said arms and formed at one end with peripheralratchet-teeth, a coiled spring embracing and having its inner endattached to said sleeve and provided with an arm extended into line withsaid box or socket, a pawl-lever having one arm provided with a toothfor engagement with the ratchet-teeth of said sleeve and another armextending laterally of the arms of said frame and pivoted at theunct-ion of its arms upon one of the latter, and means for turning saidsleeve in respect of said frame, said stud performing the function of asupport and a uniting member for the component relatively movable partsof said brush-holder.

5. In dynamo electric machine, the co1n hination with the commutator,and a sup porting stud adjacent thereto, of a brushliolder comprising aframe provided with a brush-guiding box. or socket substantially radialin respect of said commutator and with a pair of spaced parallel armseach fitted to said stud and one of the latter secure thereon so as tobe adjustable circularly and longitudinally, a loose sleeve mounteddireetly upon said stud intermediate said arms and formed at one endwith peripheral ratchet-teeth, a coiled. spring embracing and having itsinner end attached to said sleeve and provided with an arm extended intoline with said box or socket, a pawl-lever having one arm arovided Witha tooth for engagement with the ratchet-teeth of said sleeve and anotherarm extending laterall Y arms of said frame and pivoted at the junctionof its arms upon one of the latter, and means for turningsaid sleeve inrespect of said frame, the said stud performing the function of asupport and a uniting member for the component relatively movable partsof said brush-holder.

In. testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

HENRY L. ZABRISKIEJ Witnesses:

JOSEPH F. JA UITH, H. A. KonnEMANN.

of the t

